IB/uverbs: Return actual capacity from create SRQ operation

Pass actual capacity of created SRQ back to userspace, so that
userspace can report accurate capacities.  This requires an ABI bump,
to change struct ib_uverbs_create_srq_resp.

Signed-off-by: Dotan Barak <dotanb@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 38a66fbef36db593b4fc8161de42f9ed2c933b81..b157e5ff7dad216f98c0e50d3488bf4fffa3be1f 100644 (file)
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1864,6 +1864,8 @@ retry:
                goto err_destroy;
 
        resp.srq_handle = uobj->uobject.id;
+       resp.max_wr     = attr.attr.max_wr;
+       resp.max_sge    = attr.attr.max_sge;
 
        if (copy_to_user((void __user *) (unsigned long) cmd.response,
                         &resp, sizeof resp)) {

diff --git a/include/rdma/ib_user_verbs.h b/include/rdma/ib_user_verbs.h
index 3bf4402f466ac32dc4e1efb991bbed62abe14a80..338ed433306381c543aa963058804caddb48d7ed 100644 (file)
--- a/include/rdma/ib_user_verbs.h
+++ b/include/rdma/ib_user_verbs.h
@@ -44,7 +44,7 @@
  * Increment this value if any changes that break userspace ABI
  * compatibility are made.
  */
-#define IB_USER_VERBS_ABI_VERSION      5
+#define IB_USER_VERBS_ABI_VERSION      6
 
 enum {
        IB_USER_VERBS_CMD_GET_CONTEXT,
@@ -605,6 +605,9 @@ struct ib_uverbs_create_srq {
 
 struct ib_uverbs_create_srq_resp {
        __u32 srq_handle;
+       __u32 max_wr;
+       __u32 max_sge;
+       __u32 reserved;
 };
 
 struct ib_uverbs_modify_srq {